What test would you perform to ensure that a suspected open circuit is due to a bad connector rather than a broken wire?

What test would you perform to ensure that a suspected open circuit is due to a bad connector rather than a broken wire?

• A. Perform a continuity test across the path, check resistance with a multimeter, inspect connectors for corrosion or damage
• B. Power the circuit and measure noise
• C. Visual inspection only
• D. Swap with another circuit

Answer: (A)

To determine if an open circuit is caused by a bad connector rather than a broken wire, start by checking continuity along the circuit path and measuring the resistance with a multimeter. A continuity test shows whether current can flow from one end to the other; near-zero resistance means the path is complete, while an open or very high resistance points to a problem in the path. If continuity exists across the path, the fault is likely a poor connector contact, corrosion, or a loose connection at that point, and reseating, cleaning, or repairing the connector often fixes it. If there is no continuity even after testing the connector area, the issue is more likely a broken wire or an internal conductor break, which would require tracing the run and testing segments further. Visual inspection is helpful but can miss internal corrosion or hidden damage, so combining continuity testing with connector inspection directly targets the suspected bad connector. Powering the circuit and measuring noise isn’t suited to locating an open path, and swapping with another circuit doesn’t isolate the fault.

To determine if an open circuit is caused by a bad connector rather than a broken wire, start by checking continuity along the circuit path and measuring the resistance with a multimeter. A continuity test shows whether current can flow from one end to the other; near-zero resistance means the path is complete, while an open or very high resistance points to a problem in the path. If continuity exists across the path, the fault is likely a poor connector contact, corrosion, or a loose connection at that point, and reseating, cleaning, or repairing the connector often fixes it. If there is no continuity even after testing the connector area, the issue is more likely a broken wire or an internal conductor break, which would require tracing the run and testing segments further. Visual inspection is helpful but can miss internal corrosion or hidden damage, so combining continuity testing with connector inspection directly targets the suspected bad connector. Powering the circuit and measuring noise isn’t suited to locating an open path, and swapping with another circuit doesn’t isolate the fault.